Special features in the case of an AX520x two-channel device
In the case of the AX520x, the parameter S-0-0112 indicates the sum of the nominal currents for both channels. The value is device-related.
It is possible to enlarge the value of the nominal current (P-0-0093) for one channel to more than half of the value of the sum. As a result, this channel receives a larger portion of the overcurrent time area. The remainder of the nominal sum current is available to the second channel.
In the above calculation, P-0-0091 is replaced by the configured channel nominal current P-0-0093 or half of the nominal sum current:
Where Iconf = maximum from P-0-0093 and S-0-0112 / 2:
Example: AX5203
How long can a current of 7 A be supplied with the settings for channel A selected here?
Number | Name | Value channel A | Value channel B |
|---|---|---|---|
P-0-0052 | Time limitation for peak current | 0 A | 0 A |
P-0-0090 | Channel peak current | 10 A | 10 A |
P-0-0091 | Channel rated current | 6 A | 6 A |
P-0-0092 | Configured channel peak current | 7 A | 7 A |
P-0-0093 | Configured channel current | 3.5 A | 2 A |
P-0-0112 | Amplifier rated current | 6 A | 6 A |
tmax | Max. time for Ipeak | 7 s | 7 s |
Iconf = max (3.5 A; 6 A / 2) = 3.5 A
After 13 s the current of 7 A is limited to 3.5 A (P-0-0093).
For channel B, the following applies: Iconf = S-0-0112 – P-0-0093 (Ch A)
In the example. Iconf = 6 A – 3.5 A = 2.5 A
After 11.66 s the current of 7 A is limited to 2 A (P-0-0093).